Make CSSValuePool thread local to ensure correct parsing in colors on workers

third_party/WebKit/Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 383 matching lines @@
 static Color cssValueToColor(CSSValue* colorValue)
 {
     if (!colorValue || (!colorValue->isColorValue() && !colorValue->isPrimitiveValue()))
         return Color::transparent;
 
     if (colorValue->isColorValue())
         return toCSSColorValue(colorValue)->value();
 
     Color color = 0;
     // FIXME: Why ignore the return value?
-    CSSParser::parseColor(color, colorValue->cssText());
+    CSSParser::parseColor(color, colorValue->cssText(), nullptr);
     return color;
 }
 
 static inline Color getFontColor(CSSStyleDeclaration* style)
 {
     return cssValueToColor(style->getPropertyCSSValueInternal(CSSPropertyColor).get());
 }
 
 static inline Color getFontColor(StylePropertySet* style)
 {
@@ skipping 1309 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         RawPtr<CSSComputedStyleDeclaration> ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle.get()))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 } // namespace blink